Summer sampler: Ups and downs of convertibles

We sample eight cars with good, and some not so good, removable tops.

Think a GMC Yukon Hybrid sounds silly? It can save more gas than a Civic Hybrid. (more)
SUVs are becoming less popular among teen drivers and performance cars don't make the list. (more)
The future of green motoring as shown at auto shows around the world. (more)